var createError = require("http-errors");
var express = require("express");
var path = require("path");
var cookieParser = require("cookie-parser");
var logger = require("morgan");
var sassMiddleware = require("node-sass-middleware");
var cors = require("cors");

var bodyParser = require("body-parser");

var indexRouter = require("./routes/index");
var usersRouter = require("./routes/users");

var app = express();

app.all("*", function (req, res, next) {
  // //设置允许跨域的域名，*代表允许任意域名跨域
  // res.header("Access-Control-Allow-Origin", req.headers.origin);
  // //允许的header类型
  // res.header("Access-Control-Allow-Credentials", "true");
  // res.header("Access-Control-Allow-Headers", "Content-Type,Referer");
  // //跨域允许的请求方式
  // res.header("Access-Control-Allow-Methods", "DELETE,PUT,POST,GET,OPTIONS");

  if (req.method.toLowerCase() == "options") {
    res.header("Access-Control-Allow-Origin", req.headers.origin);
    res.header("Access-Control-Allow-Credentials", "true");
    res.header("Access-Control-Allow-Headers", "Content-Type,Referer");
    res.header("Access-Control-Allow-Methods", "DELETE,PUT,POST,GET,OPTIONS");
    res.send(200);
  } else {
    next();
  }
});

app.use(bodyParser.text());
// cors
app.use(cors({
  origin: function (origin, cb) {
    cb(null, true)
  },
  allowedHeaders: ['Content-Type', 'Referer'],
  credentials: true
}));

// view engine setup
app.set("views", path.join(__dirname, "views"));
app.set("view engine", "hbs");

app.use(logger("dev"));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(
  sassMiddleware({
    src: path.join(__dirname, "public"),
    dest: path.join(__dirname, "public"),
    indentedSyntax: true, // true = .sass and false = .scss
    sourceMap: true,
  })
);
app.use(express.static(path.join(__dirname, "public")));

app.use("/", indexRouter);
app.use("/users", usersRouter);

// catch 404 and forward to error handler
app.use(function (req, res, next) {
  next(createError(404));
});

// error handler
app.use(function (err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get("env") === "development" ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render("error");
});

module.exports = app;
